The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 2000
Filed:
Aug. 22, 1996
Ralf-Jurgen Becker, Hamm, DE;
Rainer Rieger, Bonn, DE;
Witco GmbH, Bergkamen, DE;
Abstract
Disclosed is a process for preparing a supported metallocene catalyst by introducing, in a first stage, a gas stream comprising an organoaluminum compound, an inert support material and water, into a first gas phase reactor; allowing the mixture to react under conditions effective to form an aluminoxane supported on said inert support material; metering a second gas stream comprising a metallocene into said gas phase reactor; allowing said mixture to react under conditions effective to form a supported metallocene catalyst; and drying, in a second stage, said supported metallocene catalyst, wherein said drying is carried out in a gas phase reactor. An alternative process comprises introducing, in a first stage, a gas stream comprising an organoaluminum compound, an inert support material, a metallocene and water, into a first gas phase reactor; allowing the mixture to react under conditions effective to form an aluminoxane supported with said metallocene on said inert support material; and drying, in a second stage, said supported metallocene catalyst, wherein said drying is carried out in a gas phase reactor.